Improvement in furnaces and stoves



E. HAWKES. e Furnace and Stove No. 164,995 4 Y Patentedlune29,l875.

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UNITED STATES PATENT OFFICE.

EZRA HAVVKES, OF BOSTON, MASSACHUSETTS.

IMPROVEMENT IN FURNACES AND STOVES.

Specification forming part of Letters Patent No. 164,995, dated June 29,1875; application filed May 28, 1874.

To all whom it may concern:

Be it known that I, EzuA HAWKES, of Boston, in the county of Suii'olkand State of Massachusetts, have invented an Improvement in Furnaces andStoves; and I do hereby declare that the following, taken in connectionwith the drawings which accompany and form part of this specification isa description of my invention sufficient to enable those skilled in theart to practice it:

My improvement consists in the means of hanging and adjusting a door forthe fire-pot, such door having side wings for checking the draft andpreventing the escape of gas.

In the drawings, Figure 1 is a side elevation of enough of a furnace toshow my improvements applied thereto, and Fig. 2 is a vertical tra-nverse section.

The base a is made, as will be seen, with inclined or sloping sides I),the incline being inward and downward, below the line of i the gratewhen the latter is in a horizontal position; and the fire-pot 0 is alsomade with sloping sides (1 at its lower part, and an upward slope, d,flaring outward from d, the slope or incline 01 being inward and upward,above the horizontal line of the grate. These inclines or slopes give aconical form to the chamber, both of the base and of the firepot, thelines of which are thus brought near to the path which the circulargrate describes when turned on its axis, and consequently leaves butlittle space between-the perimeter of the grate and the parts b and dfor coal to wedge and clog; whereas, in fire-pots as usuallyconstructed, with the inner walls of the fire-pot either vertical, orsloping outward above the lineof the axis of the grate, and in baseshaving vertical inner walls, such clogging is a source of seriousembarrassment, and attendants are'frequently unable to get thegrate backto place after turning it a little too far. The door 0, of the fire-pot,I make with side pieces or wings f, placed at about right angles withthe door, and secured to its inner side. These pieces are preferablymade broader at their lower or unhinged side, as seen, and are adaptedto fit snugly in the opening in the stove which the door is de signed tocover. When it becomes desirable to open the door slightly to check thedraft, these side pieces f serve to prevent the escape of gas from thefire-pot into the room, whereas without them it has free outlet, andespecially aft-er fresh coal has been put on diffuses itself through thehouse, destroying comfort and injuring the health.

While the side pieces f close up the sides of the opening which wouldotherwise be made by the raising or opening of the door, they yet leavean opening at the bottom; from this bottom opening the gas will notescape, for the reason that the entering current of air from without,rushing upward into the channel formed by this month and the sidepieces, will drive back into the fire-pot any gas seeking to escape, andit will there be consumed or carried up the chimney; The door has achain, the links of which pass over a pulley,

IL, supported in a bracket, 1', in which is a notch, 70, adapted to holdany link, and thus keep the door open to any desired degree.

I am aware that a door having side wings has been used at the mouth ofthe fire-pot; this broadly I do not claim. But what I do claim is- Incombination with the door having the side flanges, and applied to themouth of the fire-pot, as described, the adjusting linked chain with itspulley h, and its bracket 2', the latter being notched at k to adapt itto arrest and hold any link of the chain, as and for the purpose setforth.

, EZRA HAWKES.

Witnesses:

M. W. FROIHINGHAM, O. WARREN BROWN.

